Steam-generator.



Patented Nov. 27, |900. sHAw. STEAM GENEnATo-- (Appnmin med sept. 1v, woo.,

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LORING D. SHAW, OF CHELSEA, MASSACHUSETTS, ASSIGNOR OFl THREE EIGHTHS TO THOMAS W. GOWEN, OF MALDEN, MASSACHUSETTS.

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SPECIFICATION forming part of Letters Patent No. 662,882, dated November 27, 1900.

Application led September 17, 1900. Serial No. 30,226. (No model.) I

T0 all whom t may concern:

Beit known that I, LORING D. SHAW, a citizen of the United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Steam-Generators, of which the following is a specification.

This invention relates to improvements in steam-generators, and itis carried out as follows, reference being had to the accompanying drawings, wherein-e- Figure l lrepresents a top plan view showing parts removed and in section. Fig. 2 represents a vertical section on the line 2 2 shown in Fig. l, and Fig. 3 represents an enlarged detail vertical section of one set of the vertical tubes.

Similar letters refer to similar parts wherever they occur on the diiferent parts of the drawings.

In the drawings, A represents the ltire-pot or furnace, as is common in steam-generating devices. The boiler is composed of the bottom plate B, secured in a suitable man ner to the vertical-sides C C of the exhaustchamber C', which is connected by means of a pipe Cl to the exhaust from the steam-engine. To the interior of the upper portion of the shell C is secured the steam-boiler D, and to it are secured the horizontal plates E and F, as shown in the drawings.

G G are a series of tubes attached in their lower and upper ends to the plates B and E, and they serve to conduct the heated products from the furnace A through said tubes and into the inclosed smoke-chamber H, arranged above the plate E, as shown in Fig. 2.

Above the plate B is secured the horizontal plate I, which is connected to the plate F by means of a series ol water-containing tubes K K, as shown.

From the smoke-chamber H leads a conduit L to the exhaust-chamber C, and from the opposite end of the latter is made an opening C3, leading to a conduit C4, the upper end of which terminates as a chamber C5, having` an opening C, through which the gaseous products from the furnace are cxhausted. Such opening C6 may be connected to a smoke-flue or chimney in any well-known manner.

M in Figs. l and 2 represents afeed-water heater containing water which is heated previous to being fed into the boiler, as is common in devices of this kind.

N is a valve or gate adapted to close and open a passage leading from the smoke-chamber H to the chamber C5. By closing said valve or gate, as shown in Fig. 2, the gaseous products from the chamber H are caused to pass through the chamber C around and between the water-containing tubes K K, thus additionally heating the water contained in the boiler-tubes K K.

If it is vdesired to have a direct draft from the smoke-chamber H to the smoke-exhaust C6, it is only necessary to open the gate or valve N, as shown in dotted lines in Fig. 2.

For the purpose of causing a proper circulation of water in the tubes K, I prefer to arrange around each tube G an annular deiiector-tube O, open at its upper and lower ends and adapted to rest upon the lower boiler-plate B, as shown in the drawings, by which arrangement the water inthe lower portion of the boiler will risein the space between the exterior of each tube G and interior of the delector-tube 0 and flow downward between the exterior of the latter and the interior of the tube K, as shown by arrows in FigfS, thus establishing a proper circulation of the water in the boiler from its upper to its lower portion, and vice versa, for the purpose of rapidly producing steam.

By injectingexhauststeam into the chamber C with the heated products from the smoke-chamber H the sound of the steam-exhaust is muffled, making the boiler particularly well adapted for automobiles or engines for similar purpose where absence of noise is desired.

What I `wish to secure by Letters Patent and claim isl. In a steam-generator, in combination a series of heater-tubes G, leading from the fire-pot to a smoke-chamber a series of water-tubes surrounding said heater-tubes and a series of open-ended deIiector-tubes O, al ranged in the annular spaces between the heater-tubes and water-tubes substantially as and for the purpose set forth.

2. In a steam-generator in combination, a

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series of heater-tubes leading from the rel of the heated products from the 'furnace sub- 1o pot to the smoke-chamber a series of waterl stantially as and for the purpose set forth. tubes leading from the upper and lower Wa- In testimony whereof I have hereunto set ter-spaces and surrounding"` the said heatermy hand in presence of two subscribing Wittubes, a heater or exhaust eharnberin which nesses.

said Water and heater tubes are arranged, a I LORING D. SHAW. conduit connecting said smoke-chamber and Witnesses: exhaust-chamber With the steam-exhaust and ALBAN ANDRN,

a valve or gate for direct or indirect exhaust LARITZ N. MLLER. 

